Push Start Stop button replacement for Mercedes S-Class W221 (2006 to 2013)

Push Start/Stop Button Replacement for Mercedes S-Class W221 (2006–2013)

Replace the worn engine start/stop button on your Mercedes-Benz S-Class W221 (2006–2013) with this direct-fit replacement that restores a clean visual finish and confident press action to the single most important control in the cockpit.

The KEYLESS-GO start/stop button on the W221 is the first thing the driver touches at the beginning of every journey and the last thing pressed at the end. It sits in the center console at a height and angle that attracts constant glancing contact from the driver's hand, even when the car is already running. After 13 to 20 years of daily use, the chrome ring tarnishes, the button face coating erodes, and the once-definitive click becomes soft and imprecise.

On the flagship sedan, a degraded start button is the first thing that tells the driver the cabin is ageing. This replacement reverses that impression instantly.

Looking to upgrade the interior of your car? Also visit the Mercedes section of our aftermarket parts shop.

Compatible Mercedes Models

Mercedes-Benz S-Class (W221) – 2006 to 2013

Mercedes-Benz S-Class Long Wheelbase (V221) – 2006 to 2013

Mercedes-Benz S 63 AMG (W221) – 2006 to 2013

Mercedes-Benz S 65 AMG (W221) – 2006 to 2013

Compatible with both pre-facelift (2006–2009) and facelift (2009–2013) models in standard and long wheelbase configurations. Fits all W221 vehicles equipped with the factory KEYLESS-GO system and push-button engine start. Verify your button style against the product images before ordering.

Why the Start/Stop Button Wears Differently Than Other Controls

Most interior buttons are pressed with the pad of a finger in a controlled, deliberate motion. The engine start button takes a different kind of contact.

Drivers press it quickly and firmly at the start of the day, often while holding keys, a bag, or a coffee. The press lands at slightly different angles each time, concentrating wear unevenly across the button face. The chrome surround collects micro-scratches from rings and watch bands. And because the button sits proud of the console surface, it picks up incidental brushes from the driver's forearm throughout the drive.

The result is a button that ages faster and more visibly than any other switch in the W221 cabin. The printed START marking fades, the surface finish turns patchy, and the chrome ring loses its lustre — all in a location where the driver's eye lands at the start and end of every single journey.

What This Replacement Covers

The replacement includes the complete button assembly — the push surface, chrome trim ring, and mounting interface as a single pre-assembled unit.

The KEYLESS-GO electronic module, ignition relay, and vehicle wiring behind the button remain entirely untouched. This is a cosmetic and mechanical switch replacement, not an electronic one. If the engine starts normally when the current button is pressed but the button itself looks worn or feels loose, this is the correct part.

If the engine does not respond to a firm press at all, the issue may sit in the KEYLESS-GO control module, steering lock mechanism, or key recognition system rather than the button itself.

Installation

The factory start/stop button is mounted in the center console panel with a twist-lock or clip-in retention system depending on model year.

Disconnect the electrical connector behind the button by pressing the release tab and pulling the plug straight back. Release the retention mechanism and remove the old button from the console housing.

Insert the new button into the same cavity, engage the lock or clips, and reconnect the electrical plug until it clicks.

No console disassembly beyond the immediate button area. No coding, no key re-pairing, and no dealer visit required.

The swap takes approximately 10 minutes.

Why This Replacement Is Worth It

Complete button assembly — push surface, chrome ring, and mount in one unit

Restores the first and last control the driver touches on every journey

Eliminates the faded START marking and tarnished chrome surround that date the cabin

No KEYLESS-GO recalibration, no key programming, and no dealer software needed

A fraction of the cost of sourcing the same part through a Mercedes dealership

Explore all parts and accessories for Mercedes, browse our full range of replacement interior buttons and controls, and discover more in our interior trims collection.

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